Rock-drilling machine or engine.



PATENTBD OCT. 30, 1906.

2 SHEETS-SHEET 1.

H. HBLLMAN & L. 0. BAYLES. ROCK DRILLING MACHINE 0R ENGINE. APPLICATION FILED JAN.11,1905.

IQATENTED 0m. 30, 1906. H. HELLMAN & L. o. BAYLES. ROOKDRILLING MACHINE 0R ENGINE? APPLIOA'IIOI FILED JAE. 11,1906.

2 SHEETS-433B! 2.

$6M gmdob J UNITED STATES PATENT OFFICE.

, HENRY HELLMAN AND LEWIS CONDIGT BAYLES, OF JOHANNESBUR TRAN SVAAL.

Specification of Letters Patent.

Patented Oct. 30,1906.

Application filed January 11, 1905. Serial No. 240,661.

To all whofi talt may concern:

Be .it known-that we, HENRY HELLMAN and Lnwrs Oonnicr BAYLES, citizens of the United States, residing at Johannesburg, Transvaal, have invented certain new and useful Improvements in Rock-Drilling Machines or Engines,.of which the following is a specification.

Our present invention consists ofimprovemerits in and relating to rock-drilling machines or engines intended for use in mining work for the boring of holes for the reception of explosive charges for displacing or breaking away the. rock or mineral.

Theimprovements are more particularly designed for machines or engines constructed to operate in the manner described in a previous a plication for patent filed by us on the 1()t day of August, 1904, and bearing Serial No. 220,17 6.

The main objects of the present improvements are, first, to provide im roved means for introducing the motive flui into the machine; secondly, .to provide means for preventing the ingress into the machine of impurities or articles of solid matter that may e sus'pen ed in or carried by the motive fluid; third y, to provide mechanism which will operate to release the rotating gear during the operation of returning the machine; fourthly, to provide. an arrangement whereb the column,' column-clamp, and basebihck are all adj ustably attached and secured by means of keys or to obviate the use of screws or like contrivances, and thereby enable the mounting and dismounting to be cf fected with greater'facility, and, fifthly, to

the general construction, arrangement, and combination of parts, as hereinafter particularly described, and pointed out in the appended claims. I

A rock-drilling machine or engine constructed 1n accordance wlth our'present 1nvention is compact or of comp'arativel small dimensions, the oferative parts are a l compl'etely inclosed an protected, and it is more easily manipulated and erectedor dismounted'than existing machines.

The'valve or meansfor controlling the ad mission "of the motive fluid alternately to either end of the power-cylinder. do not in themselves form any part of the present invention, andthey may be of any suitable construction. The admission of said motive fluid may be controlled by means of a valve piston or reciprocating or by means of the percussive member.

In order that the invention may be read-. ily understood, we a pend an explanatory sheet of drawings mar hed with characters of reference corres onding to the following scription thereo and in Which Figure 1 re resents a longitudinal part-sectional elevation of the machine mounted on the column. Fig. 2 is a transverse section on line as m, Fig. 1. Fig. 3 is a transverse sece tion on line 2 2, Fig. 1. Fig. 4 is a transverse section on line y y, Fig. 1. verse section on line a y, Fig. 1.' Fig. 6 is a transverse section on line a: 2, Fig. 1.-. Fig. 7 is a section taken throu h the column-base on line y .2, Fig. 1; and

ig. 1. ing the rods 16 and 17 and gearing connected therewith.

As illustrated, the machine proper comprises the power-cylinder 1, which is slidably Fig. 5 is a trans V ig. 8 is a sectional lan taken through the column on line' 2 Fig. 9 is a sectional plan view s ow' s the cylinder 1 is rotated.

the tool 4 is compelled to rotate in unison .therewith, while it is free to move longitudinally of the cylinder 1 inthe operation of the machine.

7 is the piston or reciprocating percussive member located in the cylinder 1, which member at the end of its forward stroke strikes directl on the end of that part of the shank 5 which projects into the bore of the cylinder 1.

9 represents the port formed in the cylinder 1, along which the actuating fluid passes to the forward end of the cylinder to impel the piston 7 on its rearward stroke, and 10 is a port which by allowing the motive fluid to escape from the forward end of the cylinder 1- prevents the reversal ,of the piston 7 should it v from any cause overrun the actuating-fluid supply port 9.

11 is the cover fitted in the forward end of the protecting-casing 2. The power-cylinder 1 is arranged eccentrically in the casing 2 and is slidably supported at the forward end by the cover 11.

In the rear end of the protecting-casing 2 is fitted a cover 12, in which is journaled a spindle 13, fitted on the outer end with a handle or crank 14. On the inner end of the spindle 13, inside the casing 2, is fixed a toothed wheel 15. (See Figs. 1 and 2.) The rotation of this toothed wheel 15 by means of the crank 14 efi'ects the dual operation of feeding the drill or moving the power-cylinder 1 forward in its protecting-easing 2 as the tool 4 ienetrates the rock and also the rotation 0' the power-cylinder 1, and with it the bit or tool 4. The means we employ for effecting the rotation of the bit or tool 4 and the feeding of the machine are the same as those described in our previous application, Serial No. 220,176. Part of this mechanism is illustrated in Figs. 1, 2, and 3, and it con sists of two parallel rods 16 17, (see Figs. 2 and 3,) arranged longitudinally of the casing 2, journaled in bearings provided in the covers 11 12, on which rods 16 17 are fixed the pinions 18 19, which gear with the toothed Wheel 15 on the spindle 13. One of these rods -16 has keyed to it another pinion 20, which is slidable longitudinally (see Fig. 4) and which gears with a toothed wheel 21,

mounted on the rear end of the pow'er-oylin-- der 1 or an extension 22 of the valve-box cap 23, which is fitted to the rear end ofthe pow ercylinder 1. In the center'of the pinion is fixed a feather-key which slides in' a featherway in the rod 16, so that it may move longitudinally of the rod, while being compelled to rotate with it. The other rod 17 (see Figs. 3 and 4) is formed with a screw-thread which works through a nut 24, carried by the swivel-piece 25. The rod 16 through the pinions 18 and 20 serves to rotate the powercylinder 1 and with it the bit 4, through the toothed wheel 21, while the other and screwed rod 17 serves to traverse the powercylinder 1 longitudinally of the outer and protecting casing 2 through the feed-nut 24.

In order to illustrate the present improvements more clearly, the rods 16 17, pinions '18 19,.and ini-on 2(-) are not shown in Fig. 1 of the drawings. I In the rear cover 12 of the protecting-casin 2 is formed the intake or air-inlet 26. \Vlth the object of preventing the admission into the machine o1" any particles oi" solid matter that may be carried by the actuating fluid we arrange in the intake a gauze strainer 27, which in the form illustrated in Fig. 1 consists of a cone of gauze of a suitably fine mesh. The base of the cone is soldered or 01 hcrwise fixed to a screwed ring 28,which ring is screwed up .into the intake 26 for a suitable distance. VVlnle we illustrate the gauze strainer 27 in this position, it will be evident that it might be located in any position between the intake 26 and cylinder. By the conical shape of the strainer 27 we find that a larger volume of the actuating fluid can be assed through the intake 26 than is possib e when a disk or fiat strainer of equal diameter is employed. Instead of constructing the strainer of conical shape it will be evident that it may be made hemispherical or of other cone avo-convex form.

For the purpose of conducting the actuating fluid from the inlet 26 to the cylinder we provide an arran ement comprising a longitudinally-arrange tube 29, which at its rear end is fixed in the back cover 12 and communicates with the inlet 26. Encireling the tube 29 is a )ipe 30, which at its Forward end is closed and at its rear end is fitted with a cap 31 and jam-nut 32 in such manner that it can slide longitudinally ofthe tube 29, and 33 is acu i-lcather fitted in the cap 31 between the en of the pipe and the tube 29 to prevent the escape at that point of the actuating'fiuid. The pi w 30 is formed with an external screw-three for a portion of its length, and it is fixed to and carried by the swivel-piece 25 by screwing it into a hole (see Fig. 3) in the bottom of said swivcl-piecc 25. 34 35 are jam-nuts on the pipe 30 at either side of the swivel-piece 25, which serve to seeure it imposition. a hole 36, which latter communicates with a assage 37 in communicationwith the annuar chamber 38, formed inside the swivelpiece 25. The annular chamber 38 is placed in communication with the valve-box throu h the transverse hole 39, formed through t 1c valve-box cap extension 22. The motive fluid in its passage from the intake 26 to the valve-box passes through the gauze strainer 27, then along the tube 29 into the pipe 30, and through the hole 36 and along the passage 37 into the annular chamber 38, whence it passes by the transverse hole 39 into the valve-box inside the valve-box cap 23. 40 41 represent cup-leathers fitted in each side of the swivel-piece 25, and 42 is a ring or annular plate arranged between the toothed wheel 21 and the swivel-piece 25. The valve, when one is employed, operates to admit the motive fiuidalternately to either end of the power-cylinder 1, or either side of the piston In the pipe 30 is formed or per ssive reciprocating member 7, which projections, which form four i curved and on the rear end of the valve-box-cap exten sion22 and serves for rotating the powercylinder 1, and with it the bit or tool 4. y In order to release this gear or prevent rotation of the bit or tool during the operation of returning the machine, a cylindrical piece or 'cam 44 (see Figs. 1 and 4) is keyed or other wise securely fixed on the valve-box-cap extension 22 inside the ,.boss or center of the toothed Wheel 21. This c linder '44, as shown more particularly in ig..4, is formed with four (more or less) external wings or tapering recesses 4-5 between the outside of the cylinder 44 and the inside of the boss or center of the toothed wheel 21. ,In these four recesses 45 are located'four (more or less) rollers 46,- whose axes are parallel with the axis of the power-cylinder 1. When the toothed whee'l21 is rotated by the pinion 20 in the direction indicated bjy" the arrow in Fig. '4, the rollers 46 ride up the inclines formed by the tapering recesses and bind the toothed wheel 21 to the cylinder 44, so that the toothed wheel 21 as it rotates carries'with it the cylinder 1 andbit or tool 4..

When the toothed wheel 21 is rotated in the reverse direction, it moves the rollers 46 down the inclines until they engage the projections, which allows the inside of the toothed wheel 21 to run freely round the cylinder 44.

The cylinder 44, rollers 46, and toothed wheel 21 are maintained in position on the valve-box-cap extension 22 by means of the ring or plate 47 and nut 48, screwed on the outer extremity of'the valve-box-cap extension 22.

In 'Fig. 1 "the outer rotecting-casing 2 is shown carried by the s eeve 49, formed with a central transverse slot in which is fitted a rin 50, formed with a recess to receive a we ge or taper key 51, between whichsleeve 49 and ring 50 the .protecting casing 2 is,se-

cured by driving in the key 51. This arrangement is illustrated and described inour prior application, Serial N 0. 220,176.

52 represents the column; 53, the columnnut; 54, the jack-screw;:55, the base, and 56 the base-block. On the column 52 is ad- .'ustably mounted the column-clamp 57, (see ig. 8,) which has attached to it the sleeve 49. The sleeve 49 is formed with the cylindrical rojection 58, which fits into a hole in the co umn-clamp 57. A keyway is formed through the column-clamp 57, passing down one side of the rojection 58. In thekeyway is arranged a gib .59, which projects against-the c lindrical extension 58. In the keyway at t back of the gib 59 is placed the key 60, which when driven in one directionjorces the gib 59 inward to gripthe cylindrical projection 58, and so fixes the sleeve 49 to the column-clamp 57. The column-.

clamp 57 is fixed to the column 52 in a similar manner to the sleeve 49 by means, of a base 55 in like manner by means of the gib 63 and key 64. (See Fig. 7.) By this con struction the several parts are adjustably secured by means of the keys, so that all that is necessary to adjust the machine vertically on the column 52 or to dismantle it is to drive the several keys in the direction to disengage the gibs, which construction allows these several operations to be performed much more quick y than at present.

What we claim as our invention, and desire to protect by Letters Patent, is 1 1. In a rock-drilling machine or engine, in combination, a power cylinder carrying a pipe in opencommunication therewith and an outer rotecting-casing in which said cylinder is s idably mounted, a cover at the rear end of said protecting-casing, an act-uating-' fluid inlet or intake formed 111 said cover, a tube in communication with said intake, and slidably engaging with the pipe aforesaid, and packing between said pipe and said tube.

2. In a rock-drilling machine or engine, in combination, a power-cylinder carrying at its rear end a pipe in open communication therewith and adapted to move longitudinally therewith in either direction and an outer protecting-casing, a cover at the rear end of said protecting-casing, an actuatingfiuid inlet formed in said cover, a tube in communication with said actuatmg-fluid 1nlet and slidably engaging withthe pipe afore-' sail andpacking between said pipe and said tu e.

3. In a rock-drilling machine or engine, a power-cylinder carrying percussive apparatus, and a pipe carried by said power-cylin der, in combination with a casing surrounding said power-cylinder, a cover fitted in the rear end of said casing provided with anacloo tuating fluid inlet, a tube fitted in said cover communicating at one end with the actuating-fluid inlet and slidably engaging with the pipe carried by the power-cylinder, and packingbetween said pipe and said tube, and said I pipebeing in communication with the power--v cylinder for conducting the actuating fluid from theinlet to said cylinder, substantially as described.

4. In a rockedrilling machine, or engine,a

power-cylinder carrying percussive apparatus and a drilling bit or tool, a protectingcasing surrounding said cylinder, a cover fitted in the rear end of said casin provided forward end and adapted. to slide longitudinally of said tube, packing between said pipe and saidtube, a swivel-piece mounted at t 0 rear end of the cylinder carrying the pipe,

said swivel being constructed with ports with an actuating-fluid inlet, a tu e fitted in said cover communicating at one end with theactuating-fluid inlet, a pipe surrounding and spaced away from said tube closed at its 5 1 which place the pipe in communication with the inlet to said power-cylinder, substantially as described.

In a rock-drilling machine or engine, in combination, a power-cylinder carrying percussive apparatus and a drilling bit or tool, means for compelling said drill or bit to rotate in unison with the power-cylinder, a toothed wheel carried by the pmver-cylinder, a pinion in gear with said toothed wheel and means for rotating said pinion, means for locking said toothed wheel to the cylinder When it is rotated in one direction while permitting it to rotate independently in the reverse direction.

6. In a rock-drilling machine or engine, in combination, a power-eylinder carrying percussive apparatus and a drilling bit or tool, means for compelling said bit or tool to rotate in unison with thepower-eylinder, a

toothed wheel mounted on the rear end of the.

cylinder, a pinion in gear with said toothed.

Wheel and means for rotating said pinion, a cylindrical piece fixed to the rear end ol the cylinder and means for locking said cylindrical piece to the toothed wheel when the latter is moved in one direction while permitting the toothed wheel to rotate independently in thereverse direction so that the powercylinder and drill or bit are rota: ted through the modiun'i'of the toothed wleel when the latter is rotated in one direction, substantially described. 4

7; In. a rock-drilling machine or engine, in combination, a power-cylinder carrying percussive apparatus and a drilling bit or tool,

means for compelling the bit or tool to rotate in unison with the po\\'er-cylinder, a toothed wheel carried at the rear end of the powereylinder, a pinion in gear with said toothed wheel, means for rotating said pinion, a cylindrical piece fixed at the rear of the power-cylinder constructed with projections forming tapering'recesses inside the toothed wheel, and rollers arranged in said recesses which operate to lock the cylinder to the toothed wheel when the latter is moved in one direction and to allow-the toothed wheel to rotate freely on the cylinder when it is moved in the opposite direction, substantially as d eseribed.

8. In a rock-drilling machine or engine, in combination, a power-cylinder carrying percussive apparatus and a drilling bit or tool, means for compelling the latter to rotate with the cylinder, means arranged at the rear end of said cylinder for cmidueting the actuating fluid to the interior of said cylinder, means located at the rear of said cylinder for rotating the cylindt and with it the drilling bit or tool as the latter is l ed forward and for allowing the cylinder to be returned without rotation, and means for simultaneously rotating the cylinder and feeding the drill, sub stantially as described.

in testimony whereof we have signed our names to this specification in the presence of two subscribing wit nesses.

HENRY lllClilAlAX. LEWIS (()i\'l)l(,"l- BAYIJES.

llillessesi (TnAs. ('lvnxnwrn, it. OVENDAH'I. 

